Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a host machine and tool rest dismounting structure and a handheld tool.
The aim of the invention is achieved by the following technical scheme:
The main machine and the tool rest dismounting structure comprises
A main housing;
the auxiliary shell is detachably spliced at an opening at one end of the main shell;
a locking ring fixed at the front end of the main housing;
the locking buckle is arranged on the locking ring and can be switched between a first position and a second position; in a first position, it partially passes through the locking ring and engages in a locking groove of an auxiliary housing inserted in the locking ring; in a second position, it does not extend into the central bore of the locking ring;
The driving ring is arranged in the main shell in a autorotation mode, and when the driving ring rotates from a third position to a fourth position, the locking buckle moves from a first position to a second position; when the driving ring rotates from the fourth position to the third position, the locking buckle moves from the second position to the first position.
Preferably, in the main machine and tool rest dismounting structure, at least one guide bar parallel to the axis of the auxiliary shell is formed on the outer circumferential surface of the auxiliary shell, and a guide groove matched with the guide bar is formed on the inner wall of the main shell.
Preferably, in the dismounting structure of the main machine and the tool rest, the guide groove is an isosceles trapezoid groove, the width of the opening end of the guide groove is larger than the width of the inner end of the guide groove, and the guide strip is consistent with the guide groove.
Preferably, in the structure for assembling and disassembling the main machine and the tool rest, one end of the locking groove facing the driving ring is provided with a truncated cone, and the diameter of the end of the truncated cone facing the driving ring is smaller than the diameter of the other end of the truncated cone.
Preferably, in the structure for assembling and disassembling the main machine and the tool rest, a group of uniformly distributed mounting holes are formed in the circumferential surface of the locking ring, each mounting hole is internally provided with a locking buckle, and the locking buckle is connected with an elastic piece which applies pressure towards the axis of the locking ring.
Preferably, in the assembling and disassembling structure of the main machine and the tool rest, a groove is formed on the circumferential surface of the locking ring, and the plurality of locking buckles are driven by an elastic ring sleeved in the groove to be switched from the first position to the second position.
Preferably, in the assembly and disassembly structure of the main machine and the tool rest, the locking buckle comprises an inserting portion, a limiting portion and a jacking portion, the length of the inserting portion is larger than the depth of the mounting hole of the locking ring, the limiting portion is provided with a U-shaped groove for limiting the elastic ring, and the jacking portion is perpendicular to the end face of the locking ring, facing the driving ring, and extends to the outer side of the end face.
Preferably, in the dismounting structure of the main machine and the tool rest, the outer end of the plug-in part is a round angle.
Preferably, in the assembly and disassembly structure of the main machine and the tool rest, an inclined plane for driving each locking buckle to lift is formed on the outer circumferential surface of the driving ring.
The handheld tool comprises the main machine and the tool rest dismounting structure, wherein the motor is arranged in the main shell, and the rotating shaft of the motor is detachably connected with the power output structure arranged in the auxiliary shell.
The technical scheme of the invention has the advantages that:
This scheme design is exquisite, adopts rotation type unblock structure to replace push type structure, makes the locking knot lifting overcome the reaction force of elastic component when rotating, and rotation type structure is less for push type structure, and the required applied force of staff when the unblock is lighter, and easy operation to, this scheme only need directly insert when the installation auxiliary housing can, need not press the button, further reduce to user's requirement, convenient operation, and the locking of this scheme by the locking knot with the face contact realizes, and the stability of locking is good.
According to the scheme, the elastic ring can apply pressure to the locking buckles so that the locking buckles can synchronously and automatically reset, the synchronism of locking and unlocking is effectively guaranteed, and the smoothness and stability of the disassembly and assembly operability are improved.
The groove structures on the locking ring and the locking buckle can effectively limit the elastic ring to avoid abnormal deformation when the elastic ring is stressed unevenly, and the force application balance of the locking buckle is ensured.
The locking ring of this scheme forms the grafting structure of matching with on the auxiliary housing, can effectually prevent the relative locking ring rotation of auxiliary housing, combines the design of gib block and guide way, and abundant assurance prevents the position matching nature of structure of changeing, both convenient equipment is favorable to reducing the assembly clearance simultaneously, makes auxiliary housing installation more stable, and auxiliary housing's vibration when avoiding using is favorable to improving the stability of operation and use experience and feel.
The front end of the auxiliary shell is conical, and the front end modeling design of the plugging part of the locking buckle is combined, so that the effective driving of the locking buckle during plugging can be effectively ensured, and the smoothness of plugging is ensured; meanwhile, the shape of the locking buckle can be effectively matched with the shape of the locking groove, and the stability of locking is improved.
The reset structure of this scheme realizes the mode various, can design according to different application, and is simple easy, and the installation space that occupies is little, and stability is high.
Detailed Description
The objects, advantages and features of the present invention are illustrated and explained by the following non-limiting description of preferred embodiments. These embodiments are only typical examples of the technical scheme of the invention, and all technical schemes formed by adopting equivalent substitution or equivalent transformation fall within the scope of the invention.
In the description of the embodiments, it should be noted that the positional or positional relationship indicated by the terms such as "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in the specific orientation, and thus are not to be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the scheme, the direction approaching the operator is the near end, and the direction separating from the operator is the far end, with reference to the operator.
The structure for assembling and disassembling the main machine and the tool rest disclosed by the invention is described below with reference to the accompanying drawings, and as shown in fig. 1-4, the main machine comprises a main shell 1, the shape of the main shell 1 can refer to the shapes of various handheld tools, for example, the shape of a shell of a gun-shaped electric drill or the shape of a shell of a pen-shaped electric drill, and the like. Taking a gun-shaped electric drill as an example, the main casing 1 may be a structure formed by combining two symmetrical half parts (only the left half part is shown in the figure) and having a cavity inside and an opening at one end, and the gun-shaped electric drill comprises a holding part for holding by a human hand and a mounting part, wherein an approximately circular inner cavity is formed at the mounting part.
As shown in fig. 1-3, an auxiliary housing 2 is detachably inserted into the opening of the main housing 1, and when the auxiliary housing 2 is connected with the main housing 1, the power output structure in the auxiliary housing 2 can be connected with the power source in the main housing 1 in a torque transmission manner, so that power output is realized.
As shown in fig. 1, the auxiliary housing 2 includes a first cylinder 24 and a second cylinder 25 which are coaxial and have different outer diameters, a circular locking groove 21 is formed in a circumferential wall of a rear end of the first cylinder 24 (an outward end of the auxiliary housing 2 is a front end, and an end of the auxiliary housing is a rear end positioned in the main housing 1 when the auxiliary housing 2 is assembled to the main housing 1), and the locking groove 21 is preferably a U-shaped groove, but may be a square groove or the like. The auxiliary housing 2 is secured during assembly by a fixable member being inserted into the locking groove 21.
The assembly structure of the auxiliary housing 2 and the main housing 1 is as follows:
as shown in fig. 2 and 3, a locking ring 3, a locking buckle 4 and a driving ring 5 are disposed in the main housing 1:
the locking ring 3 is fixed at the installation part of the main casing 1 and is close to the opening, the locking ring 3 is fixed in the main casing 1 in a feasible manner such as a bolt, interference fit connection, clamping connection and the like, and the shape and the size of a central hole of the locking ring 3 are consistent with those of the first cylinder 24 of the auxiliary casing 2, so that the first cylinder 24 of the auxiliary casing 2 can be effectively inserted into the central hole of the locking ring 3 and initially positioned, and then can be embedded into the locking groove 21 on the auxiliary casing 2 through the locking buckle 4 arranged on the locking ring 3 so as to lock the auxiliary casing 2 in the locking ring 3 and prevent the auxiliary casing 2 from being pulled out.
As shown in fig. 1, the locking ring 3 is preferably a ring, and of course, it may also be a square ring or other regular polygonal ring or oval ring, so as to avoid rotation thereof, and a plurality of mounting holes 31, preferably at least three, in this embodiment, four mounting holes 31 are formed on the outer circumferential surface of the locking ring 3 for mounting the locking buckle 4, and in this embodiment, four mounting holes 31 divide the circumferential surface of the locking ring 3 uniformly so as to make the positions of the locking buckle 4 uniformly distributed, so that when the subsequent locking buckle 4 is locked, the plurality of locking buckles 4 can be uniformly distributed in the locking groove 21, thereby ensuring stability during locking.
The locking buckle 4 can be switched between a first position and a second position when in the mounting hole 31; in the first position, as shown in fig. 3, it partially passes through the locking ring 3 and engages in a locking groove 21 of the auxiliary housing 2 inserted therein; in the second position it has no portion extending into the central bore of the locking ring 3.
Specifically, as shown in fig. 1, 5 and 6, the locking buckle 4 includes a plugging portion 41, a limiting portion 42 and a lifting portion 43, where the plugging portion 41 is shaped and sized to match the mounting hole 31 and has a length greater than the depth of the mounting hole 31, so that when the locking buckle is plugged into the mounting hole 31, the front end of the locking buckle can extend into the central hole of the locking ring 3 and be embedded into the locking groove 21 of the auxiliary housing 2. The plug-in portion 41 is provided with a limiting portion 42, the width of the limiting portion 42 is equal to the width of the locking ring 3, and the lifting portion 43 is perpendicular to the inner end surface (the end surface facing the driving ring 5) of the locking ring 3 and extends to the outer side of the end surface, so that the lifting portion can cooperate with the driving ring 5.
The switching of the locking buckle 4 between the first position and the second position may be achieved in a number of ways, in one implementation the locking buckle 4 is driven by the driving ring 5 to move between the first position and the second position.
As shown in fig. 1 to 4, the driving ring 5 is rotatably disposed in the main housing 1 and is adjacent to the locking ring 3, and at least one rotating block 52 extending to the outside of the main housing 1 is formed at the outer circumferential wall of the driving ring 5, preferably the rotating blocks 52 are symmetrically disposed in two, preferably they are located at the left and right sides of the main housing 1 and are offset from the inclined surfaces 51 on which the locking buckle 4 is driven. The main casing 1 is provided with a through hole 11 for the rotating block 52 to pass through and rotate, the driving ring 5 can be driven to rotate by rotating the rotating block 52, and when the driving ring 5 rotates from the third position to the fourth position, the locking buckle 4 moves from the first position to the second position; when the drive ring 5 is rotated from the fourth position to the third position, the lock catch 4 is moved from the second position to the first position.
Specifically, as shown in fig. 1 and 7, the driving ring 5 is in a circular shape, an inclined surface 51 corresponding to each locking buckle 4 is formed on an outer circumferential wall of the driving ring 5, the inclined surface 51 is an exposed surface of a triangular block located on the outer circumferential wall of the driving ring 5, each inclined surface 51 corresponds to a position of a lifting portion 43 of one locking buckle 4, the driving ring 5 is in a third position in a normal state, a lower end of the inclined surface 51 is close to an edge of the lifting portion 43, when the driving ring 5 rotates (when the driving ring 5 rotates anticlockwise in the drawing) to a fourth position, each inclined surface 51 moves to a bottom of one lifting portion 43, and when the different positions of the inclined surfaces 51 move to the bottom of the lifting portion 43, the lifting portion 43 is lifted to different heights, so that the locking buckle 4 moves from the first position to the second position. When the drive ring 5 is reversely rotated (rotated clockwise), the inclined surface 51 moves from the bottom of the rising portion 43 to the outside of the rising portion 43, so that the distance between the rising portion 43 and the surface 53 of the drive ring 5 gradually decreases, and the lock catch 4 moves from the second position to the first position. In addition, in order to facilitate the movement of the inclined surface 51 of the driving ring 5 to the bottom of the locking buckle 4, the bottom of the end surface of the locking buckle 4, which is close to one end of the inclined surface, is chamfered or rounded, so that a gap is formed between the locking buckle 4 and the circumferential surface of the driving ring 5 to facilitate the movement of the inclined surface 51.
And, in order to enable the driving ring 5 to rotate from the third position to the fourth position and automatically reset, the driving ring 5 is further connected with a reverse driving mechanism 7, where the reverse driving mechanism 7 may be a torsion spring or a tension spring, for example, in a feasible embodiment, the reverse driving mechanism 7 is a torsion spring coaxial with the driving ring 5, one end of the torsion spring is fixed on the driving ring 5, the other end of the torsion spring is fixed on the main housing, when the driving ring 5 rotates, the torsion spring deforms and stores energy, and when the rotating block 51 is released, the energy accumulated by the deformation of the torsion spring is released, and the torsion spring restores to be original and reversely rotates and resets the driving ring 5.
In another embodiment, the outer circumferential wall of the driving ring 5 may further be fixed with one end of at least one tension spring, and the other end of the tension spring is fixed in the inner wall of the main housing 1, and in a normal state, the tension spring is pulled up to store energy when the driving ring 5 is rotated, and when the hand releases the rotating block 51, the energy stored by deformation of the tension spring is released, and the tension spring restores to the natural state and returns the driving ring 5 to the reverse rotation.
When the driving ring 5 moves from the fourth position to the third position, part or all of the locking buckle 4 cannot be automatically restored from the second position to the first position, and at this time, the locking buckle needs to be automatically restored from the second position to the first position by a resetting structure.
In a possible embodiment, each latch 4 is connected to an elastic member applying pressure thereto toward the axis of the lock ring 3, that is, the outer end surface 44 of each latch 4 may be fixed to or abut against one end of an elastic member (not shown) whose other end is fixed at the inner wall of the main housing 1, the elastic member may be a spring or a metal elastic sheet, etc., and the elastic member maintains the latch 4 in the first position when in a natural state; when the locking buckle 4 is switched to the second position, the elastic member deforms and stores energy, so that when the locking buckle 4 is no longer subjected to the jacking force of the inclined surface of the driving ring 5 or the jacking force when the auxiliary shell 2 is inserted, the elastic member releases energy to restore to the natural state, and the locking buckle 4 is automatically switched to the first position.
However, this structure is inconvenient for the whole assembly, and especially the installation of the elastic member is complicated. Thus, in a preferred embodiment, as shown in fig. 1-3, a plurality of the latches 4 may be driven to return by the same elastic member, that is, a plurality of the latches 4 may be driven to return by a set of elastic rings 6 provided at their outer circumferences, when the latches 4 move to the outside of the lock ring 3, the elastic rings 6 are forced to expand, and when the latches 4 are no longer subjected to other external forces, the elastic rings 6 contract to return the latches 4. Also, in order to secure the positional accuracy of the elastic ring 6, the stopper portion 42 of each of the locking buckles 4 has a U-shaped groove 45 defining an elastic ring, and at the same time, a ring of groove 32 is formed on the outer circumferential wall of the locking ring 3, and the elastic ring 6 is seated in the groove 32 to realize the stopper.
The locking buckle 4 may be moved from the third position to the fourth position by inserting the auxiliary housing 2 into the locking ring 3 in addition to the driving ring 5, specifically, as shown in fig. 1, the front end of the inserting portion 41 is a rounded corner, one end of the locking groove 21 facing the driving ring 5 has a conical frustum 23, the diameter of the end of the conical frustum 23 facing the driving ring 5 is smaller than the diameter of the other end of the conical frustum 23, and the diameter of the small end of the conical frustum 23 is equal to the diameter of a circle surrounded by four locking buckles 4, so that after the auxiliary housing 2 is inserted into the central hole of the locking ring 3 and contacts with the front end of the inserting portion 41, with the continuous insertion of the auxiliary housing 2, the cambered surfaces of the two can effectively cooperate to realize smooth lifting of the locking buckle 4, thereby avoiding occurrence of blocking between the two conditions; simultaneously, the conical frustum 23 can effectively extrude the locking buckle 4 out of the central hole of the locking ring to realize the position switching of the locking buckle 4. Of course, the front end of the insertion portion 41 may be V-shaped or trapezoidal.
Further, in order to better match the shape of the truncated cone 23, the shape from one end to the other end of the plugging portion 41 is an arc shape identical to the curvature of the auxiliary housing 2, so that the front end of the plugging portion 41 can be effectively attached to the side surface of the truncated cone 23, and smoothness of movement during insertion is ensured; meanwhile, the plugging part can be effectively matched with the shape of the circular locking groove on the auxiliary shell 2, so that the front end of the plugging part 41 can be effectively attached to the inner wall of the locking groove, the locking stability is guaranteed, and the coaxiality between the auxiliary shell 2 and the main shell 1 after locking can be guaranteed.
In order to avoid that the auxiliary housing 2 is rotatable relative to the locking ring 3 after being inserted into the locking ring 3, as shown in fig. 1, at least one protrusion 32 is formed at an end surface of the locking ring 3 facing the auxiliary housing 2, an arc-shaped groove 26 corresponding to the protrusion 33 is formed on a wall of a second cylinder of the auxiliary housing 2, and the protrusion 33 is inserted into the arc-shaped groove 26 to be positioned when the auxiliary housing 2 is inserted into the locking ring 3 to be locked, thereby limiting the rotation of the auxiliary housing 2.
Further, as shown in fig. 1, in order to increase convenience in plugging and to ensure positional accuracy between the protrusion 33 and the arc-shaped groove 26, as shown in fig. 2-4, at least one guide bar 22 extending along the axial direction of the plugging portion 2 is formed at the outer peripheral wall of the second cylinder 25 of the auxiliary housing 2, and a guide groove 12 matching with the guide bar 22 is formed on the inner wall of the housing 1, so that accurate positioning of the plugging portion can be effectively achieved by inserting the guide bar 22 into the guide groove 12.
For example, the guide bar 22 and the guide groove 12 are square (cuboid), and in order to facilitate the insertion of the plugging portion 2, as shown in fig. 1, the width of the guide groove 12 is slightly larger than the width of the guide bar 22, at this time, a certain gap exists between the guide bar 22 and the guide groove 12, and in the subsequent use, the gaps provide space for vibration, so that the stability of the running of the device is reduced, and the operation feel is affected.
Therefore, the guide groove 12 is an isosceles trapezoid groove, the width of the opening end of the guide groove is larger than the width of the inner end of the guide groove, and the guide strip 22 is identical to the guide groove 12 in shape, so that when the guide strip 22 is inserted, the guide strip 22 can be conveniently inserted, and meanwhile, the side surfaces of the guide strip 22 can be completely attached to the inner walls of the two sides of the guide groove 12, so that the fixing stability of the front end of the insertion part 2 (the end positioned at the outer side when the insertion part 2 is fixed on the shell 1) is ensured.
The present solution further discloses a handheld tool, as shown in fig. 9, which includes the quick-release and quick-assembly connection structure of the above embodiment, and the housing 1 is provided with a motor 10, a transmission structure (marked in the figure), a control board 20, and other structures. The shell 1 is provided with a start key 30 protruding out of the shell 1 to control the start and stop of the motor 10 and a steering switch key 40 protruding out of the shell body partially to control the forward, reverse and locking of the motor 10, and normally, when the steering switch key 40 is positioned in the middle position (locking position), the handheld tool is locked, and the start key 30 cannot control the motor to rotate; when the steering switch key 40 is located at the left side (forward rotation), the start key 30 can control the motor to rotate forward; when the steering switch key 40 is located at the right side position (reverse position), the start key can control the motor to reverse. The entire hand tool may be powered by means of a known mains connection and/or battery powered means. The above-mentioned structures of the motor 10, the control board 20, the start key 30, the steering switch key 40, and the power supply are all conventional configurations of various hand-held tools, which are not design points of the present solution and are not described herein.
Further, other structures of the conventional hand tool, such as a torque transmission structure, a clutch mechanism, a torque adjusting mechanism, an illumination lamp, etc., may be provided on or in the housing 1.
The auxiliary housings 2 are housings of tool holders 90 of different functions, each of the auxiliary housings 2 being detachably connected to the main housing, and when assembled with the main housing as a whole, being connected directly or indirectly to the motor 10 by a transmission structure in the auxiliary housing 2, thereby transmitting torque of the motor to a working head mounted on the tool holder 90, such as a drill or a reciprocating saw, to drive them to rotate or reciprocate.
In the auxiliary housing 2 of the tool post 90 of different functions, there is provided a torque output structure which can be directly or indirectly connected to a motor and transmit torque, for example, as shown in fig. 9, an output shaft 50 is coaxially and rotatably provided in the auxiliary housing 2, and when the auxiliary housing 2 is fixed in the main housing, a spline 60 coaxially fixed on the rotation shaft of the motor 10 is inserted into a spline groove formed at the inner end face of the output shaft 50, thereby achieving power transmission. The torque output structure can change the rotation motion of the motor into the form of reciprocating linear motion or swinging motion and the like for output, and the corresponding structure is the known technology and is not a design key point of the scheme and is not repeated here. Of course, the connection structure between the torque output structure in the auxiliary housing 2 and the motor may refer to the torque output structure disclosed in the prior art with reference to the application numbers 981185789, 991005600, 011119624, 2007200359081, etc.
Since after the part of the tool holders 90, such as polishing machine, circular saw, etc., are assembled to the main housing and connected with the motor by torque transmission, only one direction of rotation of the motor is needed, and accordingly, a certain steering control mechanism is needed to achieve the above-mentioned purpose, specifically, the steering switch key 40 is controlled to achieve the above-mentioned purpose:
As shown in fig. 10 and 11, the steering control mechanism includes a steering switch lock 70 provided at the socket end of the main housing, the steering switch lock 70 being driven to move linearly between a first position and a second position,
The steering switch lock 70 is in a first position, which is unrestricted with movement of the steering switch key 40;
the steering switch lock 70 is in a second position that limits the steering switch key to either the forward or reverse position or the steering switch key 40 to the locked position and is movable to only one side.
The steering switch locking member 70 is located at the interface of the main housing and the different tool holders, and the front end of the steering switch locking member is leaked, and a guiding structure for guiding the steering switch locking member 70 is provided on the main housing, for example, a set of positioning notches or a positioning slot provided on the inner wall of the main housing to ensure that the steering switch locking member 70 can move along the axis Y direction parallel to the main body of the main housing.
As shown in fig. 12 and 13, the steering switch locking member 70 comprises a main plate 701 and a blocking portion 702 located on the bottom surface thereof, the main plate 701 comprises a front end plate 703 and a rear end plate 704 with a height difference, and a joint portion 705 connecting the front end plate 703 and the rear end plate 704, wherein the front end and the rear end of the rear end plate 704 have different widths and are provided with bending portions 706 at the tail ends, and the blocking portion 702 is a cylinder, and is preferably a cylinder.
Meanwhile, the main plate 701 is kept in the first position by the elastic member 80 abutting against the main plate 701, and the elastic member 80 may be an elastic member that deforms when being pressed and automatically returns when the pressure is removed, for example, may be a spring, a metal elastic sheet, or the like, and even may be a sponge, or the like, preferably a spring, which is sleeved on the periphery of the rear end plate 704, and one end of which abuts against a step surface at the front end of the rear end plate 704, and the other end of which abuts against the baffle 102 formed on the inner wall of the main housing. So that the front end of the main board 701 can move toward the inside of the housing when being stressed; when the external force is removed, the elastic member 80 moves the main plate 701 to return.
As shown in fig. 12 and 14, the main plate 701 has a blocking portion 702 thereon to limit the movement range of the steering switch key 40 or to drive the steering switch key 40 to move to a certain fixed position during movement. Correspondingly, the steering switch key 40 has a structure corresponding to the blocking portion 702, the steering switch key 40 includes at least a first shutter 401 perpendicular to the axis X of the steering switch key 40, when the steering switch key 40 is located at the middle position, the first shutter 401 is located at one side (left side in the drawing) of the blocking portion 401, when the steering switch lock member 70 is at the first position, that is, when the elastic member 80 is in the natural state, the blocking portion 702 is not in contact with the first shutter 401 of the steering switch key 40 at the middle position, and the first shutter 401 and the blocking portion 702 are completely dislocated, that is, the blocking portion 702 is not located on the moving path of the first shutter 401, so that the first shutter 401 can freely move.
When the steering switch lock 70 is at the second position, the blocking portion 702 moves onto the moving path of the first shutter 401, so that the first shutter 401 defining the steering switch key 40 in the intermediate position moves to one side from the lock position.
Or the blocking portion 702 is defined to be stationary after the first shutter 401 driving the steering switch key 40 in the intermediate position is moved from the intermediate position to a position on one side thereof during the movement. At this time, a corresponding slope is required to be provided on the blocking portion 702 so that the first barrier is driven to move when the first barrier is in contact; of course, in another embodiment, the first plate 401 may also engage a sloping plate 402 offset from the blocking portion 702, and the sloping plate 402 is positioned opposite the blocking portion 702 when the steering switch key 40 is in the neutral position, such that the blocking portion 702 contacts the sloping plate 402 when moving along the axis Y, and may slide inwardly continuously to drive the sloping plate 402 to ultimately drive the entire steering switch key 40 from the neutral position to one side.
Also, the blocking portion 702 is not on the movement path of the swash plate 402 when the steering switch lock 70 is in the first position, so that the movement of the swash plate 402 may not be defined, and the blocking portion 702 may define the movement of the entire steering switch key 40 when it moves on the movement path of the swash plate 402; as the blocking portion 702 moves further toward the inside of the housing, the blocking portion 702 may push the swash plate 402 to drive the entire steering switch key 40 to move from the neutral position to one side. Thus, this configuration is effective to meet the requirements of the different tool holders for the respective operations, i.e. by moving the blocking portion 702 through different strokes, so as to be able to select between two operating states of the steering switch key 40, in one of which the steering switch key 40 is movable between the intermediate position and the forward position or between the intermediate position and the reverse position; in another state, the steering switch key 40 may be in only the forward or reverse position.
Further, the inner end of the first shutter 401 is engaged with a second shutter 403 perpendicular thereto, and the second shutter 403 defines a movement stroke of the steering switch lock member 70, that is, when the blocking portion 702 abuts against the second shutter 403, the blocking portion 702 is defined so that the entire steering switch lock member 70 cannot continue to move.
Still further, as shown in fig. 15, the tool holder 90 of the hand tool, which only needs to rotate unidirectionally by a motor, has a driving portion 901 matching with the steering switch locking member 70, that is, the driving portion 901 is disposed on the tool holder housing 2 of the tool holder 90 at the end plugged into the main housing, and the driving portion 901 is a driving plate corresponding to the main housing 701, when the tool holder 90 is integrally connected to the main housing, the driving portion 901 abuts against the main housing 701 and pushes the main housing 701 to move into the main housing 1, that is, from the first position to the second position. Preferably, the tool rest having the driving part 901 is a circular saw tool rest, a polisher tool rest, or a polisher tool rest.
The invention has various embodiments, and all technical schemes formed by equivalent transformation or equivalent transformation fall within the protection scope of the invention.